Tamanho de vacas Nelore adultas e seus efeitos no sistema de produção de gado de corte

Rocha, Edimara da; Andrade, Venício José de; Filho, K. Euclides; Nogueira, É.; Figueiredo, Geraldo Ramos de

doi:10.1590/s0102-09352003000400014

Cited by 20 publications

(18 citation statements)

References 6 publications

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“…Similarly to what was observed in the present study, Sarmento et al (2006), working with Santa Ines lambs, observed gradual reduction of ADG with advancing age, declining from 170 g/day to less than 30 g/day from the 2 nd to the 6 th months of age, corresponding to a reduction of 80.4%.…”

Section: Resultssupporting

confidence: 90%

“…Similarly to what was observed in the present study, Sahana et al (2004) observed the largest increases for BW, from birth to 24 months of age, while studying Jalauni sheep. At this age, the weight values of 25.0 kg and 20.9 kg, accounted for 70.4% and 76.8% of adult BW for males and females, respectively.…”

Section: Resultssupporting

confidence: 90%

“…Body measurements, such as thoracic circumference, body weight and body length have been used in the definition of adult size, nutritional requirements and physiological maturity of the animals (Rocha et al, 2003). These measurements provide important information about the physical development according to sex and category, allowing the establishment of the relation between conformation and functionality of the animal (Araújo Filho et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Characterization of body biometrics during growth of elite Santa Ines sheep

Neto¹,

Cruz²,

Malhado³

et al. 2012

R. Bras. Zootec.

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-The objective of this study was to characterize body biometrics of Santa Ines sheep during growth. Data from 4,038 animals, males and females, with ages from four to 36 months, from different herds participating in the National Agricultural Fair in Bahia from 2003 to 2008 were used. The characteristics evaluated were: body weight, average daily gain, body length, thoracic circumference, anterior height and posterior height. The mean values found were compared by the Student-NewmanKeuls test. All characteristics studied showed gradual change with aging, and it is worth-noting that age had positive effect on body weight, body length, thoracic circumference, anterior height and posterior height and negative effect on average daily gain.Average daily gain was reduced by 68.5% from four to 36 months of age, while the mean improvements observed in both sexes in this age range, for body weight, body length, thoracic circumference, anterior height and posterior height were 137.8%, 23.5%, 43.2%, 19.3% and 19.6%, respectively. However, the increments for body weight, body length and thoracic circumference were higher until 12 months of age, when an increase of 72.7%, 14.6% and 24.8% in their respective characteristics was verified. For anterior height and posterior height, the greatest increase occurred up to eight months of age with improvement of 8.4% for both measures. Santa Ines sheep have different growth rates for body measurements; whereas growth in posterior height stabilizes earlier, the thoracic circumference, along with body weight, remains growing for longer time.

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Section: Resultssupporting

confidence: 90%

Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Characterization of body biometrics during growth of elite Santa Ines sheep

Neto¹,

Cruz²,

Malhado³

et al. 2012

R. Bras. Zootec.

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“…Indeed, the chest circumference showed no relationship with nutritional level and %N degree to reach puberty. The frame score is used to measure the size of the animal and represents a positive correlation with nutrient intake (Rocha et al, 2003). We observed higher frame score values as the percentage of Nelore degree increased.…”

Section: Discussionmentioning

confidence: 72%

Relationship of post-weaning growth and age at puberty in crossbred beef heifers

et al. 2017

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-This study was intended to evaluate body size structure and growth parameters of crossbred heifers fed at four nutritional levels to achieve puberty earlier. Animals were classified depending on their level of crossing between Nelore and Hereford and subjected to four nutritional levels (kg day -1 ) as follows: 0.5 (light; n = 32), 0.75 (medium; n = 32), 1.00 (high; n = 29), and 1.25 (very high; n = 27). Heifers at puberty and at weaning were individually classified for growth parameters. The fat thickness and longissimus muscle area throughout the experimental period were determined by ultrasonography. The height, heart girth, frame, and weight:height ratio were variables used to evaluate body traits. Univariate analysis of variance using the GLIM MIXED procedure os SPSS was performed and the significance level was set at 0.05. Age and body weight at puberty were 388±1.9 days and 331.4±1.3 kg, respectively. Body condition score demonstrated an interaction between nutritional level and crossbred degree. Heifers with the highest degree of Nelore had higher fat thickness and lower weight:height ratio compared with other racial groups at puberty. Pearson correlation coefficient showed a negative association for body condition score (-0.34) and fat thickness (-0.58) compared with age at puberty. The increased fat thickness at younger ages at puberty was observed in all racial groups. The increased weight:height ratio at younger ages at puberty was observed in all racial groups. We observed higher values for a frame in animals at the higher level of supplementation. There is a greater correlation between live weight gain and phenotypic traits during weaning to achieve puberty at an earlier age in crossbred heifers.

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“…Outro fator é a menor exigência nutricional, pois, segundo ROCHA et al (2003) a defi nição da necessidade de nutrientes do animal é estabelecida em função do seu porte físico.…”

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